/Engine/Source/Runtime/AudioMixer/Public/AudioMixerBlueprintLibrary.h
Gets information about all audio output devices available in the system
static void GetAvailableAudioOutputDevices ( const [UObject](API\Runtime\CoreUObject\UObject\UObject) * WorldContextObject, const [FOnAudioOutputDevicesObtained](API\Runtime\AudioMixer\FOnAudioOutputDevicesObtained) & OnObtainDevicesEvent )